Transcriber's Note

Any missing page number relates to a blank page in the original book. Spelling errors issued in the author's errata have been corrected and noted by the use of a dotted underline in the text. Scrolling the mouse over such text will display the change that was made. Any other printer errors not included in the errata list remain.

Scribal abbreviations are depicted as "v[~re]" when in the original the tilde appeared above the letters enclosed in brackets.